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Brocade Communications Systems 12.4.00 manual Lacnic

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		DNS	A
TABLE 28	IANA IPv6 address assignment (Continued)

Address		Designation

2001:0A00::/23		RIPE NCC

2001:0C00::/23		APNIC

2001:0E00::/23		APNIC

2001:1200::/23		LACNIC

2001:1400::/23		RIPE NCC

2001:1600::/23		RIPE NCC

2001:1800::/23		ARIN

2001:1A00::/23		RIPE NCC

2001:1C00::/23		RIPE NCC

2001:2000::/23		RIPE NCC

2001:3000::/23		RIPE NCC

2001:3800::/23		RIPE NCC

2001:4000::/23		RIPE NCC

2001:4200::/23		AfriNIC

2001:4400::/23		APNIC

2001:4600::/23		RIPE NCC

2001:4800::/23		ARIN

2001:4A00::/23		RIPE NCC

2001:4C00::/23		RIPE NCC

2001:5000::/20		RIPE NCC

2001:8000::/19		APNIC

2003:A000::/20		APNIC

2001:0000::/20		APNIC

2003:0000::/18		RIPE NCC

2400:4200::/12		APNIC

2600:0000::/12		ARIN

2610:0000::/23		ARIN

2620:0000::/23		ARIN

2800:0000:/12		LACNIC

2A00:0000::/12		RIPE NCC

2C00:0000::/12		AfriNIC

ServerIron ADX Global Server Load Balancing Guide	255
53-1002437-01

Image 267

Brocade Communications Systems 12.4.00 manual Lacnic

Contents

ServerIron ADX Brocade Communications Systems, Incorporated Contents ServerIron ADX Global Server Load Balancing Guide Page Gslb for IPv6 feature support Global server load balancing for IPv6 overviewGslb for IPv6 example IPv6 IPv4Page Text formatting AudienceSupported hardware and software Document conventionsBold text Related publications Getting technical help or reporting errorsWeb access Mail and telephone accessPage Global Server Load Balancing overview Global Server Load BalancingBasic concepts Global Server Load Balancing overview Gslb example Global Server Load Balancing configurationDNS Gslb policy Server health Weighted IP metricWeighted site metric Site ServerIron ADX’s session capacity thresholdActive bindings metric Geographic location of the server Site ServerIron ADX’s connection load Site ServerIron ADX’s available session capacity toleranceSite ServerIron ADX’s FlashBack speed Site ServerIron ADX’s administrative preference Least response selectionRound robin selection 128 Basic controller and site communication Minimum required configurationSyntax show gslb policy Configuring Gslb Configuring GslbPage Proxy for DNS server Adding a source IP addressProxy for DNS server Syntax no server source-ipip-addr ip-mask default-gateway Configuring a site Enabling the Gslb protocolSyntax no gslb protocol Syntax no gslb site name Specifying site locationsConfiguring a zone Specifying Gslb controller locationsSyntax no gslb dns zone-name name Syntax no dns cname-detect Applying Gslb to Cname recordsCname status is shown in bold type Configuring Http health check parametersConfiguring DNS domain name aliases Configuring null host names Configuration exampleSyntax host-info host-namealias alias-name Syntax dns override Private VIPs for GslbPrivate VIPs for Gslb Configuring a public IP address for a VIPPrivate VIP display information Displaying Gslb IP informationShow gslb dns detail the following is an example Syntax show gslb site Configuring Gslb protocol parametersChanging the protocol port number Syntax show server virtual-name-or-ipYou can modify the following DNS-related Gslb parameters Changing the Gslb protocol update periodModifying Gslb parameters related to DNS responses Syntax no protocol status-interval numSyntax no dns best-only Removing IP addresses for sites that fail a health checkSyntax no dns ttl num Changing the query intervalSyntax no dns check-interval num Changing the TTL for DNS recordsSyntax no dns override Syntax no dns ttl Enabling DNS overrideChanging the Gslb policy metrics Metric Default Configuration options Configuring Gslb protocol parameters Gslb policy metricsConnection load Syntax no metric-order set list Changing the order of Gslb policy metricsDisabling or re-enabling individual Gslb policy metrics Syntax metric-order defaultSyntax clear gslb dns zone-name name Clearing DNS selection countersDNS response processing Implementing the weighted IP metricFor name, enter up to 32 characters Configuring weighted IP metricsSyntax no weighted-ip Syntax no gslb dns zone name Syntax host-info www ip-weight IP address weightSyntax show gslb dns zone Implementing the weighted site metricSan Jose 50% New York 30% London 20% Total 100 100% Syntax weight weight Traffic distribution specificationsConfiguring weighted site metrics Syntax no weighted-site Syntax gslb site site nameSyntax show gslb traffic site First example shows the first two sitesSite Three Implementing the active bindings metricEnabling active bindings Gslb active bindings enhancements Configuring weighted active bindingsSpecifying the site connection limit Configuring connection load parametersChanging the sampling intervals and sample rate Syntax no connection-load limit average-loadSyntax no connection-load weights weight1 weight2...weight8 Changing the sample interval weightSyntax no flashback application tcp tolerance num Changing the FlashBack tolerance valuesSyntax no capacity threshold num Syntax no num-session tolerance numChanging the RTT cache interval Modifying round-trip time valuesChanging the RTT tolerance Syntax no round-trip-time cache-interval numChanging the RTT cache prefix Syntax no round-trip-time cache-prefix numAdding static prefix cache entries Syntax no round-trip-time explore-percentage numSecure Gslb Enabling default geographic locationPage Secure Gslb Gslb message content randomizationConfiguring secure Gslb RSA challenge dialogueGenerating RSA key pair Configuring secure-communication on the controllerExchanging public keys Bob sends back his public key C.D Selecting a peer public key management optionSyntax clear gslb session-keys Regenerating the session keysManually regenerating the session keys Dynamically regenerating the session keysMinimum Gslb configuration Site persistence in Gslb using stickinessAlgorithm Enabling sticky Gslb Site persistence in Gslb using stickinessSyntax no sticky age value Configuring the sticky Gslb session life timeAllowing sticky sessions for a specific prefix length Syntax no stickySyntax show session all offset Displaying current sticky Gslb sessionsSyntax show gslb dns detail Sticky Gslb countersEnabling hash-based Gslb persistence Site persistence in Gslb using hashingDeleting sticky Gslb session for a specific client Deleting all sticky Gslb sessionsSyntax show gslb phash table Hashing schemeRank IP address allocationIP address failure or removal from domain Rehash new IP address for a domain or change of stateDisabling rehash Syntax hash-persist persist-rehash-disable time-out Manually forcing rehash for a domainSyntax hash-persist hold-down time Show commands This section contains the following subsections Weighted distribution of sites with hash-based persistenceWeighted distribution of sites with hash-based persistence Syntax show gslb phash table zone-name name host-name nameIP address allocation Gslb weighted hash-based persistenceGslb hash-based persistence Hashing schemeIP address failure or removal from domain Disabling rehash on change in hash weight configuration Rehash change in hash weightEnabling weighted hash-based Gslb persistence Syntax no hash-persist weightedSyntax no prefix-len-hash-persist length Configuring weights for domain IP addresses Disable rehash when weight for an IP is changedSyntax host-info host-nameip-hash-weight IPaddress weight Syntax no hash-persist disable-weight-rehash Hash persist hold down timerSyntax show gslb policy host-policy-name policy-name Show commandsManually forcing rehash for a domain Clear Gslb phash countersDisplaying the contents of active RTT cache entries Affinity AffinitySyntax gslb affinity Defining the affinitySyntax show gslb cache ip-addr Displaying RTT prefix cache entriesSyntax show gslb dns detail name Gslb domain-level affinityDisplaying affinity selection counters Overview of Gslb domain-level affinityAssociating the domain-level group with a domain Command line interfaceConfiguring an affinity for prefix 0.0.0.0/0 Creating a domain-level affinity groupSyntax show gslb resources Show gslb affinity-group group-numberSyntax show gslb affinity-group group-number Show gslb resourcesSyntax show gslb dns detail zone-name DNS cache proxyDNS cache proxy Show gslb dns detailSyntax no dns cache-proxy To enable DNS cache proxy, enter the following commandsEnabling DNS cache proxy Displaying DNS cache proxy stateDNS cache proxy Disable the default Displaying DNS cache proxy statisticsSyntax show gslb global-stat Gslb DNS type any query Combining the DNS cache proxy and DNS override featuresTransparent DNS query intercept Transparent DNS query intercept configuration Transparent DNS query intercept Redirecting queriesSyntax no server virtual-name-or-ip name ip-addrintercept Syntax no server remote-name name ip-addrSyntax no source-nat Syntax no port dnsRedirecting queries and perform Gslb Syntax no bind dns real-server-namednsSyntax ip policy index cache udp dns global Responding to queries directly Syntax dns transparent-intercept Displaying transparent DNS query intercept statisticsEnabling DNS request logging Syntax no gslb log-dnsEach message shows the following information Enabling DNS request logging Gslb request information Support for the RTT metricDistributed health checks for Gslb BP support as Gslb agentEnabling DNS request logging ADX Syntax no si-name name ip-addrno-si-dist-health-checkSyntax no no-distributed-health-check Configuring the health status reporting intervalSyntax no si-name name ip-addrenable-si-dist-health-check Disabling or re-enabling distributed health checkSyntax no agent-health-report-interval secs Configuring the agent health report intervalDebugging the distributed health check Syntax no health-status-interval secsImpact of distributed health checks on the Flashback metric Configuration examples TopologyExample Example Example Steps involved in a Dnssec resolution are Dnssec Example with Authentication ChainDnssec Verification with DIG Dnssec Gslb in DNS proxy modeConfiguring a backend Adns server as Dnnsec capable Configuring Dnssec for GslbCache proxy mode Configuring a zone for DnssecSyntax no server use-dnssec-servers-for-dns-queries Displaying Dnssec configurationDisplaying Dnssec statistics Syntax no port dns use-dnssec-servers-for-dns-queriesHost-level policies for site selection Configuring host-level policiesHost-level policies for site selection Global vs host-level policyDefining a name for a host-level Gslb policy Configuring the parameters for the host-level policyRemoving all IP addresses except the best address Syntax no dns active-onlyModifying Flashback tolerance To re-enable this metric, enter the following commandDisabling or re-enabling the Flashback metric Syntax no flashbackSyntax no health-check Enabling the Geographic metricSyntax no geographic Enabling the Health Check metricResetting the order of the metrics Enabling the Preference metric Configuring the Num-session ToleranceEnabling the Num-session metric Syntax no num-sessionSyntax no round-trip-time Changing the RTT tolerance Syntax no weighted-ipEnabling the weighted site metric Syntax no round-robin Enabling the Round-Trip-Time metricDisplaying a host-level policy Syntax no weighted-siteDisplaying host-level policy information Applying a host-level policy to a Gslb hostSyntax show gslb policy host-policy-all Displaying all Gslb policiesDisplaying the policy used for hosts Displaying the number of host-level policiesSyntax show gslb dns zone I detail Syntax clear gslb host-policy policy-name Configuration exampleDeleting Gslb host-level policies Deleting a policy that is not applied to a hostHow geographic location is determined Geographic region for a prefixConfiguring a geographic prefix For IPv4For IPv6 Syntax show gslb cache IP address prefix Displaying the number of geographic prefixesDisplaying information about geographic prefix Geographic region for a prefixSyntax show gslb cache all geographic user-configured Example configuration90% of 22ms + 10% of 1 sec = 119ms Smoothing mechanism for RTT measurementsSmoothing mechanism for RTT measurements 90% of 20ms + 10% of 40ms = 22ms134 Syntax gslb enhanced-rtt-smoothing Enabling enhanced RTT smoothingDisabling enhanced RTT smoothing Configuring the parametersSyntax no ramp-down-factor value Specifying the ramp-up-factorSyntax no ramp-up-factor value Specifying the ramp-down factorSyntax rtt-val value Syntax enable-sim-new-rtt-smoothSyntax disable-sim-new-rtt-smooth State gets cleared. You can command in the simulationSmoothing mechanism for RTT measurements Smoothing mechanism for RTT measurements Round-trip times Determining if the new RTT smoothing mechanism is enabledRound-trip times Passive RTT gatheringPassive RTT gathering Active RTT gatheringActive RTT gathering Support for both active and passive RTTEnabling active RTT Active RTT gathering issues and trade-offsSyntax no gslb active-rtt-gathering Syntax no gslb disable-rtt-gatheringDiscarding passive RTT Disabling passive RTT gatheringSpecifying how often to report the active RTT Configuring active RTT parametersConfiguring active RTT query message interval Configuring the cache interval for active RTT prefixConfiguring the active RTT refresh interval Setting the RTT algorithm modesSyntax no gslb agent-rtt-refresh-interval value Using only passive RTT Accepting DNS RTT measurements Syntax gslb dns-probe enable-fallbackSyntax gslb dns-probe disable-fallback Probes for RTT gatheringSending DNS probes on a different port Aging out prefixes when Icmp probe failsAging out prefixes when DNS probe fails Enabling the DNS proberActive RTT gathering and high availability support Displaying the RTT gathering mechanism Displaying RTT informationSyntax show gslb active-rtt-info Displaying the active RTT gathering configurationDisplaying the RTT information of a client IP address Round-trip times Show Gslb active RTT informationSyntax show gslb cache ip-address This field Displays For example, enter a command such as the following Displaying the RTT algorithm modeConfiguring an HA group Gslb affinity for high availabilityGslb affinity for high availability Enabling dynamic detection Syntax no gslb dynamic-peer-detect Displaying HA informationDisplaying all HA groups Displaying the HA peer for a siteDisplaying the dynamically detected HA pairs Gslb affinity for HA View the configured HA group using the following commandSyntax no gslb process-vip-list-optimize This command requires a reload to take effectGslb optimization Optimized VIP list processingSyntax no si ip-addressoptimized-dist-hcheck Syntax no gslb send-vip-list-optimizeSyntax no gslb dont-send-active-bindings Gslb optimization On the site ServerIron ADX, configure the following commandsDisplaying Gslb information Guidelines and recommendations for using this featureDisplaying Gslb information Displaying site informationName parameter specifies a site name Syntax show gslb site nameSite Displaying Gslb information Global SLB site information Displaying real server informationSyntax rshow remote-ip-addrserver real virtual session bind Syntax show gslb dns zone name Displaying DNS zone and hostsZone Displaying detailed DNS information Host a Flashback Displaying metric information Syntax show gslb default Displaying the default Gslb policyDNS TTL Displaying Gslb information Gslb policy informationDisplaying the user-configured Gslb policy ServerIronADXconfig# show gslb cache Static prefix cache entries on Displaying Gslb resources This command shows the following information Gslb resourcesSession statistics Another way to list the real servers Displaying dynamic server informationDisplaying Gslb information Gslb resources Port binding information The TCP and UDP portsDisplaying dynamic real server information Displaying virtual server informationSyntax show server dynamic real Syntax show server dynamic bind Displaying the port bindingsListing the real servers Syntax show server dynamic virtualSyntax show gslb cache all Specifying the source IP of probesDisplaying information in the prefix cache Syntax gslb src-ip-active-rtt ip-addressSyntax show gslb cache ip-addrlonger-than prefix-length Syntax show gslb cache all affinitySyntax show gslb cache all geographic static Syntax show gslb cache all ip-addrSnmp traps and syslog messages Snmp traps and syslog messagesSyntax show gslb cache ip-addrsmaller-than prefix-length Syntax show logging Syslog messagesGslb error handling for unsupported DNS requests Syntax no snmp-server enable traps trap-typeDisabling and re-enabling traps Using Gslb error handling with transparent intercept mode Default settings for Gslb error handlingGslb error handling for unsupported DNS requests Error handling response formatDisable or re-enabling Gslb error handling Configuring the return codeViewing error handling statistics Clearing the error handling statisticsSyntax clear gslb unsupported-response-cnt Gslb error handling for unsupported DNS requests Global server load balancing for IPv6 overview Global Server Load Balancing for IPv6Gslb for IPv6 feature support Gslb for IPv6 example IPv6 Gslb configurationOn Gslb ServerIron ADX controller Basic Gslb for IPv6 configurationEnabling DNS cache proxy Configuring the Gslb controllerBasic Gslb for IPv6 configuration Adding a VIP for the Adns serverEnabling DNS override Configuring zonesSpecifying DNS override IP lists Syntax no host-info host-nameip-list ipv6-addressHost-nameparameter specifies the host name Configuring sites Enabling the Gslb protocol Site ServerIron ADX configurationBasic configuration example Configuration on Gslb ServerIron ADX Gslb controllerEnable the Gslb protocol on each of the Site ServerIron ADXs Configuration on site ServerIron ADXsGslb site persistence Advanced Gslb configuration for IPv6Refer to Server host health Configuring Gslb policy metrics for IPv6Not supported Refer to FlashBack speed metric Changing the order of Gslb for IPv6 policy metricsSyntax no metric-order set list Server host health metric Resetting Gslb policy metricsEnabling the weighted IP metric Weighted IP metricSpecifying the weight of IP addresses in the IP list Advanced Gslb configuration for IPv6For zone-name, enter up to 32 characters Weighted site metric DNS response processing Traffic distribution specificationsSession capacity threshold metric Configuring weighted site metricsActive bindings metric Enabling active bindingsSyntax no active-bindings Configuring weighted active bindings Geographic location metric Configuring a geographic prefix Specifying site locationsSpecifying Gslb controller locations Available session capacity metric FlashBack speed metric Administrative preference metric Configuring administrative preference for a site Least response selection metricRound robin selection metric Sticky persistence for IPv6 Enabling sticky persistence for IPv6 Syntax no sticky ipv6-prefix-length decimal Specifying sticky session prefix lengthsSpecifying sticky session life times Deleting sticky sessionsSpecifying hash-based persistence prefix lengths Hash-based persistence for IPv6Weighted hash-based persistence for IPv6 Manually forcing a rehash for a domainSyntax no ipv6-prefix-len-hash-persist decimal Configuring weights for domain IP addresses Disabling rehash when weight for an IP is changed Configuring an active-only policy Configuring DNS response parametersGslb of ANY queries Configuring a best-only policyDisplaying Gslb for IPv6 configurations Show commands for basic Gslb configurationsDisplaying DNS cache proxy statistics Displaying Gslb for IPv6 configurations Displaying the default Gslb policyDNS TTL Displaying the user-configured Gslb policy Displaying information about a geographic prefix ServerIronADX VIP === Displaying DNS zone and hosts When you configured the zone information Africa X100us Counters 2001db8abc Cfg Zone-nameparameter specifies a particular Gslb zone Displaying site information Specifying the weight of IP addresses in the IP list onServerIronADXconfig# show gslb site Administrative preference metric on Show commands for advanced features Displaying the hash tableSite-nameparameter specifies a site name Syntax show gslb ipv6 phash active-ip allocation table Troubleshooting Gslb for IPv6 configurationsClearing Gslb phash counters Displaying Gslb debug countersTroubleshooting Gslb for IPv6 configurations Troubleshooting IPv6 lists Debug trace for GslbSyntax show gslb message IPaddress Syntax debug track feature gslb algorithm sticky generic all Troubleshooting Gslb for IPv6 configurations IPv4 IPv6IPv4 RFC DNS South America Address Designation IPv6 address assignmentLacnic